The Mag Lap Top Tray is made of 3/16" aluminum with 1/4" hole every one inch to help in dissipating heat from your Lap top. This item has an opening in the rear to run your cables through and a stop bar at the bottom edge to help secure your Lap Top. The tray has an adjustable swivel mechanism that enables you to position your Lap Top at any angle. It comes with a 5/8" baby reciever that will fit into any standard 5/8" Baby Pin Device.